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Long-Lived Assets - Geographic Areas (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Long-Lived Assets by Geographic Areas [Line Items]      
Total long-lived Assets $ 1,465.1 $ 1,342.7 $ 1,005.3
United States      
Long-Lived Assets by Geographic Areas [Line Items]      
Total long-lived Assets 1,344.9 1,238.4 947.7
Canada and Mexico      
Long-Lived Assets by Geographic Areas [Line Items]      
Total long-lived Assets 85.1 72.2 43.0
North America      
Long-Lived Assets by Geographic Areas [Line Items]      
Total long-lived Assets 1,430.0 1,310.6 990.7
All other foreign countries      
Long-Lived Assets by Geographic Areas [Line Items]      
Total long-lived Assets $ 35.1 $ 32.1 $ 14.6